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Rhizospaera Needlecast #792337

Asked May 23, 2022, 8:35 PM EDT

What shall I use to treat my black Hills Spruce for this fungal infection? The trees are all less than four feet tall and have grown from about 15 inches in their current location. Late last summer, three of the 24 trees were infected. I used an over the counter treatment which did not work. Please let me know what, how, and were to purchase a solution. Kathleen Sloan

Clearwater County Minnesota

Expert Response

The following publication addresses your question.
https://extension.umn.edu/plant-diseases/rhizosphaera-needle-cast

If you used one of the recommended fungicides without getting any benefit, consider submitting samples of of diseased foliage to the University of Minnesota Plant Disease Clinic to determine whether a needle cast disease other than Rhizosphaera may be present.
An Ask Extension Expert Replied May 23, 2022, 10:52 PM EDT

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